booting.txt listed only H, Zbb, Zihintpause and Svpbmt as required, while
required_extensions[] in cpufeature.c also checks for I, M, A, Zicsr,
Zifencei and, with CONFIG_RISCV_ISA_C=y, C. As the panic message printed
for a missing extension points to booting.txt, document the missing ones.
Also add a section pointing to riscv_isa_ext[] for the optional extensions
Xen recognises, and a comment above required_extensions[] to keep it in
sync with the document.
No functional change.
Suggested-by: Baptiste Le Duc <baptiste.le-duc@vates.tech>
Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Signed-off-by: Baptiste Le Duc <baptiste.le-duc@vates.tech>
Acked-by: Jan Beulich <jbeulich@suse.com>
Oleksii Kurochko
469d83d42f